Disk attachment.



E. R. BEEMAN & T. BRENNAN, JR.

DISK ATTACHMENT.

APPLICATION FILED AUG. 28, 1914.

Patented Mar. 9, 1915.

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Ewe/Z237? Eda/m I? Beeman EDWIN :a. BLEEMAN ANI) THOMAS BRENNAN, JR, OF 'sT. Louis IEARK, MINN-itsoTA,

AssIGNoas To MONITOR DRILL COMPANY, or MINNiiAPoLis, MINNESOTA, A 00R- PonATioN or MINNEsoTA.

DISK ATTACHMENT.

Specification of Letters Patent.

Application filed August 28, 1914. Serial N 0. 859,040.

To all whom it may concern:

Be it known that we, EDWIN R. BEEMAN and THOMAS BRENNAN, J r., both citizens of the United States, residing at St. Louis Park, county of Hennepin, and State of Minnesota, have invented certain new and useful Improvements in Disk Attachments, of which the following is a specification.

The present invention has reference to certain improvements in disk attachments, and particularly to improvements 1n bearings for the same.

The invention has particular reference to improvements in double disk attachments,

and has for its main object to so improve the disk bearings of the same that the disks will more readily and perfectly adjust themselves and remain in contact with each other at all times. For this purpose it will be understood that the disks are mounted with their planes or peripheral portions at an angle to each other, and that means must be provided for pressing the disks toward each other under a spring pressure, so that they will be maintained with their edges in contact at the proper point at all times, regardless of changes in the diameter of the disks owing to their wear in service.

Another object of the invention is to so construct the disk bearing that it can be readily assembled, and to so construct it that either disk can be readily removed when the occasion requires, so that the farmer can readily substitute another pa1r of disks.

Other objects and uses will appear from a detailed description of the invention, which consists in the features of construction and combinations of parts hereinafter described and claimed.

In the drawing Figure 1 shows a vertical elevation of a disk attachment provided with a bearing embodying the features of the present invention, the disk on the near side of the boot being cut away on the line l1 of Fig. 2; and Fig. 2 is a longitudinal section taken on the line 22 looking in the direction of the arrows, this being the diameter of the disks which includes the point of contact between them. i

The frame 3 of the disk attachment may be made in the usual and customary manner, being provided with a downwardly depending boot 4. At its lower end thls boot carries the rod or tube 5 which constitutes an axle and which has its end portions bent n the proper directions to constitute bearlugs on which the sleeves or bushings may slide back and forth in their adjustment. The plane which includes the bent end portions of the axle 5 is the plane which includes the point of contact between the edges of the disks.

On each of the end portions of the axle 5 we slidably mount a sleeve or the like .6. The outer end of each sleeve is provided with an annular flange 7, behind which is a slot or groove 8 adapted to receive a cotter pin or the like 9. Each cotter pin is extended through holes in the end of the axle 5. Inasmuch as the said axle is rigidly secured to the boot so that it cannot rotate, it follows that the sleeves are likewise retained against rotation, although they may adjust themselves in and out along the end portions of the axle 5. In order to effect such adjustment, we have provided the spiral springs 10, the inner ends of which bear against the back sides of the annular flanges 7 and the outer ends of which bear against washers 11, which are held in place by means of the cotter pins. Inasmuch as the sleeves and cotter pins do not rotate, it

follows that there is no twisting or turning effort exerted on the springs. Each of the sleeves has its inner portion tapered toward the boot and on each of these tapered portions is mounted a hub 12 for the corresponding disk 13. These hubs are suitably proportioned to bear against the annular flanges 7, so that they will never bind on the sleeves but, on the contrary, will rotate freely on them. i

The pressures exerted by the springs 10 will bring the disks together at the point 14 indicated in each of the figures. As the disks wear or are ground away in service, the hubs 12 will be pressed closer and closer toward each other, but the disks will always be maintained in contact under spring pres. sure. Furthermore, in case of any inequality in either of the disks, such as an imperfection in its manufacture or grinding,the disks will be free to adjust back and forth with respect to each other as they rotate, being held in contact at all times under spring pressure.

The customary cap or protector 15 may be threaded onto each of the hubs 12 forthe purpose of protecting the sleeves and other moving'parts so that they will not become 7 I each side of the boot, a sleeve slidably clogged or obstructed by dirt or dust. 7

From the foregoing it will be seen that whenever it is desired to remove either disk it is only necessary to remove the corre.- sponding cap 15 and withdraw the corresponding cotter pin, whereupon the hub and disk may be readily removed without in any manner interfering with the other disk and a bearing. It W111 also be, noted from an examination of Fig. 2 that the sleeves 6 terminate short of the inner faces of the hubs 12. By so p'roportioning the parts assurance is had that the sleeves will never come into binding contact with the boot as the disks wear down in diameter.

While we have herein vshown and 7 described only one form of construction embodying the features of ourinvention, nev-' 'ertheless it will be understood that we include within the scope of our invention any slidably mounted on each projecting end portion, the outer end ozteach' sleeve being provided with a'transversely extending slot, Y

a cotter pin or the like extended through V each'projecting end portion and'lying within the'slotof the corresponding sleeve, a

spring interposed between each of said'cotter pins and the corresponding sleeve and serving to force the sleeve toward theboot,

a peripheral flange on each sleeve, anda disk rotatably mountedadjacent to each sleeve and provided with a bearing poi'tion'adapted to rotate on the sleeve and seat against the corresponding flange.

2. In a disk attachment, the combination with a downwardly depending boot,,of an axle member supported by and projecting a v V to each side of the boot, a sleeve slidably mounted on each projecting end portion, means for forcing each sleeve toward the boot, means for retaining each sleeve against rotation, an annular flange encircling each sleeve near the outer end thereof, a disk rotatably mounted with respect to each sleeve,

and a bearing portion on each disk adapted to rotate on the corresponding sleeve and seat against the flange thereof.

' 3. In a disk attachment, thecombination with a downwardly depending boot, of an axle member secured to and projecting to mounted on each projecting portion of the axle member, means for retaining each sleeve against rotation'with respect to the axle member, spr ngs tending to carry the sleeves toward each other, each sleeve being provided with an annular projecting flange near its outer end, a disk rotatably mounted with respect to each sleeve, and a bearing portion on each disk, each bearing portion being adapted to rotate on the corresponding sleeve and-seat' against the flange thereof. I' w 7 l r V 4. Ina disk attachment, the combination witha downwardly depending boot, of an axle member secured toand projecting to the sides of the boot, a sleeve slidably mounted on each projecting portion of the axle member, means for retaining each sleeve against rotation with respect to the axle member, means for carrying theisleeves toward-each other and toward the boot, each sleeve being provided with an annular projecting flange near its outer end, and

tapering in size vtoward its inner end, "a disk rotatably mounted with respect to each sleeve and a bearing member on each disk rotatably mounted on the tapering port-ion of the corresponding sleeve and seating against the annular flange thereof, 7 5. In a disk attachment, the combination with a downwardly depending boot, of an *axle member secured to andprojecting to the SlClGS' of the boot, a sleeve slidably mounted on each end of the axle, means for retaining each sleeve against rotation with I respect to-the axle member, means for carrymg the sleeves toward each other and toward the boot, an annular projecting flange on each'sleev'e near the outer end thereof, a

disk rotatably mounted withrespect to each sleeve, a bearing member on each disk frotatably mounted on the corresponding sleeve,

each sleeve tapering indiameterfromthe annular flange toward the inner end thereof and the corresponding disk bearing member rotating on saidtapered portion andbeing' of a s ze to seat against the corresponding annular flange.

EDWIN R'BEEMAN. l

V THoMAs-Bn NNA JR.

Witnesses i J I Gno. SGHLETLY, V WV. S. WARNER.

copies o f this patent may be obtained for five cents each, by addressing the Commissioner of Pat ents, I

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